Yosemite Forum

Travelling to and visiting Yosemite National Park in Winter and most of Spring, when snow is on the ground. Includes visiting in winter, snow play, downhill and nordic skiing, ice skating, snowshoeing, and snow camping.

Tuolumnee (Tioga Road) is 150% of normal, so will open late. Peregoy Meadows (Glacier Point Road) is 101% of normal. So Glacier Point should be open by mid-June. By the last half of May the sun is intense enough to melt several inches a day.
http://cdec.water.ca.gov/cgi-progs/reports/COURSES.html